Use fs rather than fs.promises for createWriteStream. Fixes #1840 (#1841

)

src/routers/InteractiveCompute/job-files/start.js

@@ -1,6 +1,7 @@
 const {spawn} = require('child_process');
 const WebSocket = require('ws');
-const fs = require('fs').promises;
+const fs = require('fs');
+const fsp = require('fs').promises;
 const { promisify } = require('util');
 const pipeline = promisify(require('stream').pipeline);
 const path = require('path');
@@ -48,7 +49,7 @@ class InteractiveClient {
  const stream = await client.getFileStream(dataInfo);
  await pipeline(stream, fs.createWriteStream(dataPath));
  const filePath = path.join(...dirs.concat('__init__.py'));
- await fs.writeFile(filePath, initFile(name, type));
+ await fsp.writeFile(filePath, initFile(name, type));
  }
 
  this.runTask(saveArtifact);
@@ -69,7 +70,7 @@ class InteractiveClient {
  async writeFile(filepath, content) {
  const dirs = path.dirname(filepath).split(path.sep);
  await mkdirp(...dirs);
- await fs.writeFile(filepath, content);
+ await fsp.writeFile(filepath, content);
  }
 
  async runTask(fn) {
@@ -114,7 +115,7 @@ async function mkdirp() {
  await dirs.reduce(async (lastDirPromise, nextDir) => {
  const dir = path.join(await lastDirPromise, nextDir);
  try {
- await fs.mkdir(dir);
+ await fsp.mkdir(dir);
  } catch (err) {
  if (err.code !== 'EEXIST') {
  throw err;